In this Tuesday, September 24, 2013 file photo, a DC-10 airplane tanker drops fire retardant to battle a wildfire in the San Gabriel Mountains in Azusa, Calif. AP Photographer Nick Ut will be retiring from the AP in March 2017 after 51 years of taking photographs from the front lines of the Vietnam War to the red carpets of Hollywood. (Photo by Nick Ut/AP Photo)

In this Tuesday, September 8, 2009 file photo, a Los Angeles firefighter looks under a fire truck stuck in a sinkhole in the Valley Village neighborhood of Los Angeles. Four firefighters escaped injury early Tuesday after their vehicle sunk into the hole caused by a burst water main in the San Fernando Valley, authorities said. (Photo by Nick Ut/AP Photo)

In this Saturday, May 29, 2004 file photo, people gather on a pier in Huntington Beach, Calif., as the sun sets. (Photo by Nick Ut/AP Photo)

In this June 8, 1972 file photo taken by Huynh Cong Nick Ut, South Vietnamese forces follow terrified children, including 9-year-old Kim Phuc, center, as they run down Route 1 near Trang Bang after an aerial napalm attack on suspected Viet Cong hiding places. After making the photo, he set aside his camera, gave the badly burned girl water, poured more on her wounds, then loaded her and others into his AP van to take them to a hospital. When doctors refused to admit her, saying she was too badly burned to be saved, he angrily flashed his press pass. The next day, he told them, pictures of her would be displayed all over the world, along with an explanation of how the hospital refused to help. (Photo by Nick Ut/AP Photo)

In this June 8, 1972 file photo, vombs with a mixture of napalm and white phosphorus jelly dropped by Vietnamese AF Skyraider bombers explode across Route-1, amidst homes and in front of the Cao Dai temple in the outskirts of Trang Bang, Vietnam. In the foreground are Vietnamese soldiers and journalists from various international news organizations. The towers of the Trang Bang Cao Dai temple are visible in the centre of the explosions. (Photo by Nick Ut/AP Photo)

In this March 22, 1975 file photo, a refugee clutches a baby as a government helicopter gunship carries them away near Tuy Hoa, Vietnam, 235 miles northeast of Saigon. They were among thousands fleeing from Communist advances. (Photo by Nick Ut/AP Photo)

In this March 11, 1972 file photo, a South Vietnamese soldier holds his personal belongings in a plastic bag between his teeth as his unit crosses a muddy Mekong Delta stream in Vietnam near the Cambodian border. His unit was charged with stemming Communist infiltration from Cambodia into South Vietnam in the heavily populated Mekong Delta area. (Photo by Nick Ut/AP Photo)

In this Friday, June 8, 2007 file photo, Paris Hilton is transported in a police car from her home to court by the Los Angeles County Sheriff's Department in Los Angeles. As she was taken to jail for driving violations, this photo was made on the 35th anniversary of the day Ut made the “Napalm Girl” picture in Vietnam. (Photo by Nick Ut/AP Photo)

In this Saturday, May 29, 2004 file photo, a man walks near the Yahiko Shrine during snowstorm in Yahiko Mura City, Japan. (Photo by Nick Ut/AP Photo)

In this Wednesday, June 23, 1976 file photo, Muhammad Ali throws a left punch at a sandbag during workout at a gym in Tokyo. Later in the week, the world heavyweight boxing champion met Japanese pro wrestler Antonio Inoki in the world's Martial Arts Championship. (Photo by Nick Ut/AP Photo)